Ill take a stab at it.
Keep in mind Quantum Physics is not my forte.
But yes a tree falling in the woods does create a "sound" because it creates frequency which has an effect on Matter, Space, Time. So even if there is not a life form to interpret the frequency the very Universe itself hears the tree falling because the Universe itself is conscious, so to speak and unfolding as it must. Entropy
IMO
Bear in mind again it's a humble anons laymen explanation.